<!DOCTYPE html>
<html>
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title></title>
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <style>
        .v-enter,.v-leave-to{
            opacity: 0;
            transform: translateY(100px);
        }
          .v-enter-active,
          .v-leave-active {
            transition: all 2s ease;
            /* position: absolute; */
        }
        /* .v-leave-active{
            position: absolute;
            transition: all 2s ease;
        } */
        .v-enter-to,.v-leave{
            opacity: 1;
            transform: translateY(0);
        }
        .v-move {
            transition: all 2s ease;
        }
    </style>
</head>
<body>
    <div id='app'>
        <button  @click="flag = !flag">切换</button>
            <transition appear>
            <h3 v-show="flag">这是一个普通动画</h3>
        </transition>
        <!-- <transition-group appear tag="ul">
            <li v-for='(item,index) in goodsList' :key='item.id'  @click="delGoods(index)">{{item.name}}</li>
        </transition-group> -->
    </div>
    <script>
    const vm = new Vue({
        el: '#app',
        data: {
            flag:true,
            goodsList:[{
                id:1,
                name:'张三',
            },{
                id:2,
                name:'李四',
            },{
                id:3,
                name:'王五',
            }]
        },
        methods:{
            delGoods(index){
                this.goodsList.splice(index, 1)
            }
        }
    })
    </script>
</body>
</html>